PT-2024-25381 · Linux+8 · Linux Kernel+8
Published
2024-05-29
·
Updated
2025-09-29
·
CVE-2024-33621
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.37
Description
A vulnerability in the Linux kernel has been resolved, where a raw packet from a PF PACKET socket on top of an IPv6-backed ipvlan device hits WARN ON ONCE() in sk mc loop() through the sch direct xmit() path. The issue is triggered when the
skb->sk is used in ipvlan process v{4,6} outbound. To fix this, it is recommended to call ip{6} local out() with NULL sk in ipvlan as other tunnels.Recommendations
For Linux kernel versions prior to 6.6.37, update to version 6.6.37 or later to resolve the vulnerability. As a temporary workaround, consider disabling the
ipvlan process v{4,6} outbound function until a patch is available. Restrict access to the vulnerable ipvlan module to minimize the risk of exploitation. Avoid using the skb->sk variable in the affected code path until the issue is resolved.Exploit
Fix
RCE
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Ubuntu